Is there any way to generate Inverted or taper geometry by using displacement?
I write an answer as proposed to by @SHikhaMittal. Though, still not sure this is the wanted result.
As this is about &quot;any shape&quot;, have used an image, like a decal, to drive the displacement.

The shape is colored with &quot;wireframe&quot; node, so that we can see the result of the displacement in term of geometry.
The nodes:

Bottom part is the decal used to drive the displacement scale. It is 0 outside of the image.
The middle line is to offset the normal around the mesh center. X and Y parts are scaled and added to the normal in order to drive this normal &quot;outside&quot;.
Top part, the wireframe colors.

Remarks:
We can notice that the scaled and displaced part looses resolution, because we only keep a small amount of vertices and scale them.
The other answer by Bruk, using another way to do it (scaling down a larger part along a cylinder) should avoid this issue.